Worldwide, Jonby (Jonby 
) is a very rare mostly boy's, but uncommonly female first name. The forename Jonby is characteristic of South-eastern Asia, particularly Philippines, where it is a very rare dominantly masculine, but seldom female name. Much less frequently, Jonby is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Jonby | Philippines, Venezuela |